Several wiring methods of Lithium-ion battery protection board

Lithium-ion battery protection board is charge and discharge protection for series lithium-ion battery pack; when fully charged, it can ensure voltage difference between each unit battery is less than set value (generally ±20mV), and achieve equalization of each unit of battery pack and effectively improving charging effect under series charging mode. Also simultaneously detect overvoltage, under voltage, overcurrent, short circuit, and over temperature conditions of each single cell in the battery pack, protect and extend battery life. Under-voltage protection enables each single battery prevents damage to battery due to over discharge during discharge.

There are two main components of the finished lithium-ion battery, lithium-ion battery core and protection board. The lithium-ion battery core is mainly composed of positive electrode plate, diaphragm, negative electrode plate and electrolyte; positive electrode plate, diaphragm and negative electrode plate wound or laminated, packaged, and electrolyte poured. After the package made into a battery core, many people do not know the role of the lithium-ion battery protection board. The lithium-ion battery protection board, as the name implies, used to protect the lithium-ion battery. The role of the lithium-ion battery protection board is to protect the battery but not charge it. Stream, there is output short circuit protection.

Connection of Lithium-ion battery protection board

There are two ways to design the lithium-ion battery protection board, which are the positive and negative plates. The principle and purpose are the same, but the device does not support the software to modify the settings of the positive and negative protection boards, so it can only be physically correct. Connect to determine the protection mode, and the software used is different. The following describes the connection methods and operation methods of the two protection boards.

Introduction to several wiring methods for lithium-ion battery protection board

The connection method of the battery protection board is generally the same as the negative protection board, the negative pole board, and the positive board. The other methods not described one by one. The details are as follows:

1. The connection mode of the negative plate referred to the following table.

Introduction to several wiring methods for lithium-ion battery protection board

2. The negative port connected to the same port. Please refer to the table below for the wiring sequence.

Introduction to several wiring methods for lithium-ion battery protection board

3. The positive plate connected to the same port. Please refer to the table below for the wiring sequence.

Introduction to several wiring methods for lithium-ion battery protection board

In the process, the battery protection board has many connection methods when testing on non-standard battery equipment, and it is also worthy of familiarity with the test connection. The simple process is as follows:

1. Place the device on a relatively level desktop and adjust the smoothness of the device to make it smooth.

2. Ensure that the humidity of the equipment is in the range of 30~50%. If the humidity is too high, the casing will leak and the electric shock will occur.

3. Connect the appropriate power supply (AC220V/0.1A), turn on the main equipment power button, and turn on the respective power module buttons.

4. Check if the equipment can display normally and test normally.

Lithium-ion battery protection board several wiring methods

Some lithium-ion batteries are the third temperature protection line, and some are battery information check-lines (such as changing the non-original battery to alert). Lithium-ion batteries are battery + protection boards. The 3 line will only appear on the protection board, and the battery will always have only 2 lines. There are two kinds of lithium ion batteries, and the obvious 3.7V is non-phosphorous aluminum and aluminum, which can directly changed.

The replacement is very simple (note the positive and negative):

1. Remove the original battery pack, and then solder the iron to separate the protection board from the battery.

2. Remove protective plate of your new battery and connect the battery to old protection board.

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